Thinner Compensation Plates for reduced Squeeze film damping

Document #:

LIGO-T1000175-v2

Document type:

T - Technical notes

Abstract:

A Technical review board, convened by M1000030, has recommended decreasing the thickness of the compensation plates. The understanding is that early adoption of this approach is considerably less expensive than a retrofit.

Files in Document:

• ThinnerCPs.pdf (302.4 kB)

Other Files:

• ThinnerCPs.docx (164.1 kB)

Topics:

• Change Control
• Technical Review Board
• Core Optics
• Sensing and Control
• Suspensions
• Vacuum
• System Engineering

Authors:

• Matthew Evans
• Peter Fritschel

Keywords:

TRB Thin CP Compensator Plate

Notes and Changes:

Corrected error in CP mass change (6 kg, not 3 kg).
Added some info on expected pressure levels.

Related Documents:

• LIGO-T0900416: Gas Damping in Advanced LIGO Suspensions
• LIGO-T0900509: Gas Damping of the Final Stage in the Advanced LIGO Suspensions
• LIGO-T0900582: Gas Damping Monte Carlo
• LIGO-T1000065: Gas damping of Advanced LIGO test masses
• LIGO-D1000979: D1000979_ALIGO, COC TCP (THIN COMPENSATION PLATE) SUBSTRATE

Referenced by: